import java.util.Arrays;
import java.util.Scanner ;
class PersonSortable implements Comparable<PersonSortable>{
	private String name ;
	private int age ;
	@Override
	public String toString() {
		return this.name + "-" + this.age;
	}
	public PersonSortable(String name, int age) {
		this.name = name;
		this.age = age;
	}
	public PersonSortable() {
	}
	public int compareTo(PersonSortable person){
		if(this.name.equals(person.name))
			return this.age - person.age ;
		return this.name.compareTo(person.name) ;
	}
}
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		PersonSortable persons[] = new PersonSortable[n];
		for(int i = 0; i < n ; i++){
			persons[i] = new PersonSortable(sc.next(),sc.nextInt());
		}
		Arrays.sort(persons) ;
		for (int i = 0; i < persons.length; i++) {
			System.out.println(persons[i].toString());
		}
		System.out.println(Arrays.toString(PersonSortable.class.getInterfaces()));
	}
	
}